2-12-08Lec11 - Lecture 11 Lecture 11-1 Ideal vsReal Battery...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture 11 Lecture 11-1 Ideal vsReal Battery Energy conservation Work done by battery is equal to energy dissipated in resistor 2 2 dW iRdtoridtiRd iR t ε ε = = ∴ = • Ideal battery:no internal energy dissipation EMF ε = terminal voltage V • Real battery: internal energy dissipation exists dW> i 2 Rdt or ε > iR=V Lecture 11 Lecture 11-2 Real Battery = Resistors in Series eq R rR ∴ =+ h The current through devices in series is always the same. iriR ε − − = ≡ R eq i ε eq iR ε − = , i R r ε ∴ = + internal resistance 1 2 3 ... eq R R R R = + + + For multiple resistors in series: terminal voltage b a V V ir R R r ε ε − =− = + Lecture 11 Lecture 11-3 Resistors in Parallel ≡ 11 2 2 3 3 iR iR iR ε = = = ( ) 1 2 3 eq ii iR ε = + + 1 2 3 1 2 3 1 1 1 1 eq eq or R R R R R R R R ε ε ε ε ∴ + + = = + + Devices in parallel has the same potential drop ••• L R A ρ = Generally, 1 1 i eq i R R = ∑ Lecture 11 Lecture 11-4 Kirchhoff’sRules Kirchhoff’sRule 1: Loop Rule x When any closed loop is traversed completely in a circuit, the algebraic sum of the changes in potential is equal to zero. i loop V Δ...
View Full Document

This note was uploaded on 04/07/2008 for the course PHYS 241 taught by Professor Wei during the Spring '08 term at Purdue University.

Page1 / 13

2-12-08Lec11 - Lecture 11 Lecture 11-1 Ideal vsReal Battery...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online